Vitamin B 12, also known as cobalt amine, is the only vitamin containing metal elements. In nature, vitamin B12 is synthesized by microorganisms. Higher animals and plants cannot make vitamin B12. Vitamin B12 is the only vitamin that requires the help of an intestinal secretion (endogenous factor) to be absorbed. Some people due to gastrointestinal abnormalities, lack of this endogenous factor, even if adequate dietary sources can also suffer from malignant anemia. There is basically no vitamin B12 in vegetable foods. It stays in the gut for a long time and takes about three hours (most water-soluble vitamins take only a few seconds) to be absorbed. Vitamin B 12's main physiological function is to participate in the production of bone marrow red blood cells, prevent malignant anemia, prevent brain nerve damage. Vitamin B 12 is one of the last B vitamins to be found so far. Vitamin B12 is a polycyclic compound containing 3 valent cobalt. Four reduced pyrrole rings are linked together to form a Golin macroring (similar to porphyrin), which is the core of vitamin B12 molecule. Therefore, compounds containing this ring are referred to as Golin-like. Vitamin B12 is a light red acicular crystal which is easily soluble in water and ethanol. It is most stable under the condition of weak acid pH 4.5 and 5.0, and decomposes in strong acid (pH < 2) or alkaline solution, which can be destroyed to some extent in the event of heat. But short time high temperature disinfection loss is small, encounter bright light or ultraviolet ray is easy to be destroyed. The loss of ordinary cooking process is about 30%.

Magaca Product:	VITAMIN 12
CAS:	68-19-9
MF:	C63H88CoN14O14P
MW:	1355.37
EINECS:	200-680-0
Faytamiin B12, oo loo yaqaan VB12 marka la soo gaabiyo, sidoo kale loo yaqaan 'cobalamin', waana mid ka mid ah fiitamiinnada B, waa fasal ka kooban iskudhafyo isku-dhafan oo dabiici ah oo ay ku jiraan maadada Corrin, waxayna ku jirtaa cobalt-ka seddexaad ee isku midka ah ee loo yaqaan 'porphyrin Corrin' ee bartamaha giraanta Waana molecule ugu weyn uguna murugsan ee la ogaaday. Sidoo kale waa fiitamiinka kaliya ee leh bir bir ah. Kaniisaddu waa casaan, waxaa sidoo kale loo yaqaannaa fitamiin cas. Warshadda kuma jirto VB12, mana soo saari karto VB12. Beerka ayaa ah isha ugu wanaagsan ee laga helo VB12, ka dibna laga helo caanaha, hilibka, ukunta, kalluunka iyo wixii la mid ah. VB12 waa coenzyme muhiim u ah isku-darka RNA iyo DNA. La'aanta VB12 ee vivo waxay sababi kartaa isbeddelo jireed oo ku dhaca habdhiska dareenka sida neerfaha durugsan iyo nidaamka neerfaha ee dhexe.